Hello dear I understand your concern It is not herpes as it is very painful. Your lump could be due to Blocked hair follicle, Blocked sweat gland (sebaceous gland). Exact diagnosis require vaginal and clinical examiantion. You can use premium service of the HCM in which you can upload the image for better management. Take following advises: Apply neomycin ointment Tablet ibuprofen Apply warm pad application Wear pure cotton loose inner and avoid sweatings. Maintain proper pelvic hygiene Other treatment will depend on the specific cause Hope this may help you COntact HCM for further health query Best regards Dr. SAGAR